Compression-space annex for internal-combustion engines.



D. T. BROWNLEBF. W. SPACKE n l. D. LOWE.

COMPRESSEON SPACE ANNEX FUR INTERNAL COMBUSTION ENGINES. APPmcATmu men JAH.28`. 19m.

l l 3&96?, Patented Apr. 6,1915

.infondere A rumana, Assrenons 'ro Trie F. W. sracnn' Mannini "BALEAR T. BROWNLEE, FRED W. SPACKE, .'ND JOHN D. LOWE,y OF' INDIANAPOLIS,

INDIANA, A CRPORTION OF INDIANA.

., eoeajeganssroN-sraen'eunnx' non rutrnnuancomnusrron Enemies.

Specioatioii 'of ietters Patent.

Patented Apr. 6, i915.

Application filed .anuarggfzv 1914. Serial No. 815,024.

T0 all whom it may concern Be it known 'that we, DALMAR T. Beowu- LEE, Ferio W. Shaolin, and JOHN l). Lown,

citizens of the United States, residing at Indianapolis, in the 'county of Marion and State of Indiana, have invented a, new and useful Compression-Space Annex for lnternal-Combustion Engines, "of which the following is a specification.

In many types oi' internal combustionengines, especially those which are uscdin niotor cycles, the compression isvery high and.

difficulty is therefore experienced in starting such motors. 'Many operators attempt to avoid this diliiculty by opening the exhaust valves and spinning-the motor very fast un-V til there is momentum enough in the fly wheel to carry the motor over its high coinpression stroke, This operation@ however, is one which requires considerable skill and strength.

The object of our present invention is to eyoid the diiiiculties outlined above by providing an internal combustion engine with an additional compression 'space which may lbe connected with or disconnected from the combustion chamber so that, when connected with the combustiony chamber, the degree of compression while materially lessened,

nevertheless remains sufficient to malle possible, without expenditure of great Jforce, the ignition of the preliminary tharges.l

. The accompanying drawings illustrate our invention.-

Figure l is a fragmentary side elevation of a two-cylinder engine equipped with our improvement; Fig. 2 an axial section'of our attachment about full-size, a portion of the engine cylinder being shown in dotted lines.

. bottom of the enlargement 'l5 being prefer- In the drawings, 10 indicates the engine cylinder provided with a threaded opening 11. Threaded into this opening is the lower end of a tubularvsteml 12. having an axial bore 13 which is enlarged at its lower end at 1a and enlarged at its upper end at 15, the

' ably formed into a valve seat 16.A Externally the stern 12 is provided with 'a polygonal portion 17 by means ofrwhich it may be driven to place in the cylinder head and the upper face of this portion 17 forms a seat 18 for the reception of the annex compression 4chamber 19 which is sleevedl upon stem 12 and held in place by a clamping nut 23 to its seat.

20. The lower end ojl' bore 14, which projects into the combustion chamber of the engine is formed into a valve seat 22 upon 'which normally rests an inwardly opening a COMPANY, or rnnm'naromsf f valve 23. The stem 24 ofvalve 23 is projected up through bore 13 and at its upper end is threaded at 25 to receive an adjustable head `2tlpwhich `at its lower end may be formed with a yalve-27 adapted to seat in the scat 16.A Arranged in the bore 15 is a .compressionspring 28 which engages the 23 so that any forces exerted upon the head of valve 23 tending to drive vthe same sud* dcnly toward its seat will notbreak the sup-l port of cam 32. The upper end of bore 14 communicates through openings 35 with the interior of chamber 19 and the lit of stem 24 in bore 13, while close enough tol properly guide the stem, Ais .loose enough to permit gradualleakage from the interior ofthe chamber. Chamber 19 must oi course be of The arm v29 is preferablyv l suliicient strength towithstand the possible explosion which may occuntherein and for that reason we consider it adiisableto tie the upper and lower walls together 'by spaced posts 37.

ln operation, chamber 19 is normally disconnected from the explosion chamber of the cylinder 10 but when itis desired tostart the engine'the operator, by swinging lever 32 of cam 32, opens Valve 23 and thus adds chamberl) to the compression space of the engine so that, on the compression stroke, the live gases are driven back tinto chamber 19 and the total compression is reduced by the proportion which the volumeof chamber 19 bears to the normal'volurne of the compression space of the cylinder. As soon as the engine has started underits own power, cam 32 is withdrawn and lyalve 23 returns to its seat, thus restabhshing normal compressionspace of the engine. lf valve 27 is provided it will seat in seat it, during the time the valve 23 1s open and.

thus stop all leakage from chamherlO. This valve Il' however is not essential. When 'alve Q3 has been closed, after compression has taken place in chamber 19, there will he gradual leakage through bore 17 around stem El, and, before another starting operation is required, the pressure Within chamber 19 will have become reduced to atmos plieric pressure.

le claim as our invention:

l. As an article ol manufacture, a compression-space annex for internal` combustion engines comprising a threaded stem having a alve seat formed at its lower end, a valve inox-nhl)Y mounted in said stein and normally seated in said valve seat, a coinpression chamber carried hy said stem and communicating with the bore thereof, a

, spring' for normallyholding said valve tr its seat, and a cam arranged to operate upon said valve to open the saine.

A-s an article of manufacture, a compression-space annex for internal Acemloustion engines comprising a threaded stem having' a va'lve seat formed at lower end, a valve inmnloly mounted in said stem and normally lseated in said ralve seat, a coin- -pression chamber.' carried hy said stem and communicatiner with the here thereof, a spring Yfor normally holding said valve to its seat,1 a ram arranged to operate upon said valve to open the same, and a support l'or said cani resilent in theline of movement of the valve.

As an article of manufacture', a comn'ession-spaee annex for internal combustion engines compi 'sing' a main stem threaded at one end for attachment to an internal combustion engine and threaded at the other en'd 'for the reception of a clamping niemifer and haring a longitudinal here provided with a valve seat at one end and opening laterally to an intermediate portion of the circum'l'erence fof the stein, a valve asso- .main stem, a chamber sleeved upon the main stein and coveringr the said lateral opening, a clamping member attached to the main -stem and holding said chamber in plaee,

and a member associated with said parts by which the valve may be shifted inwardly from its seat.

As an article of manufacture, a, cornpression-spaee annex :for internal combustion engines comprising a threaded stein having a valve seat formed at its lower end, a valve movahly mounted in said stein and normally seated in said valve seat, a eompression chamber carried by said stem and communieatingcr with the bore thereof, a cam arranged to 'operate upon said valve to open thesanie, and a support for said cam resilient in the line ot' movementotf/the valve.

5. ils an article ol manufacture, a coin- ]nession-space annex for internal combustion engines'comprising a main Stein threaded at one end for attachment to an engine cylinder and havinga longitudinal bore laterally extended through the main stein atan intermediate point in its length, said .here being,` formed into a valve seat at its attaching end, a valve associated with said valve and having its stem extended through the longitudinal here, and a chamber re* movably mounted upon said stem and covering the said lateral opening.

In witness whereof, we have hereunto set our hands at Indianapolis, Indiana, this twenty-sixth day of January, A. D. one thousand nine hundred and fourteen.

DftLMR T. BRO'WNLEE. FRED W. SPACKE. JOHN D. LVVE.

TWitnesses lll SuLAwnin, El. fr. Unika. 

